Wiring for a engine stand

With the momentary switch like this, there is a continuous connection to ground through the starter solenoid.
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The path to ground through the coil is interupted to release a high voltage charge to fire each spark plug.


In this one, the path to grpound is continuously interupted
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Which means the current to the starter solenoid will get continously interupted as the relay flickers on and off...